Axial flow fan blade and axial flow fan

Abstract

The present invention relates to the technical field of refrigeration equipment, and in particular to an axial flow fan and an axial flow fan, wherein the axial flow fan comprises: a hub and a plurality of blades connected to the outer end surface of the hub at equal intervals; the lower surface of the blade is a pressure surface, the upper surface of the blade is a suction surface, and a plurality of guide grooves are arranged at intervals along the airflow direction on the suction surface, each of the guide grooves is in a wave shape; each of the blades also comprises a connecting section connected to the hub and a tail connected to the connecting section. The present invention can effectively control the airflow to flow along a predetermined path, avoid airflow turbulence, thereby reducing shedding noise, and significantly improving the ventilation efficiency and stability of the axial flow fan.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to an axial flow fan blade and an axial flow fan. Background Art

[0002] At present, as people's living standards continue to improve, people's material requirements are getting higher and higher; for daily necessities such as air conditioners, people also have higher requirements for its appearance and quality. Noise, as an important indicator of customer experience during air conditioner operation, has also attracted more and more attention. People are not only concerned about the noise of the indoor unit of the air conditioner, but also the noise of the outdoor unit of the air conditioner. Studies have found that axial flow blades have a great influence on the noise generated when the outdoor unit of the air conditioner is running.

[0003] The axial flow fan blades of the existing air-conditioning axial flow fans include a fan blade body that is used to be set in the outdoor unit body and cooperate with the fan motor. The fan blade body is generally composed of a hub structure that is fixedly driven with the motor and 3 to 7 blades arranged circumferentially on the periphery. The two sides of the blade, one is the windward side that mainly does work when rotating, which is called the pressure side, and the other is the leeward side, which is called the suction side. The above structure has the phenomenon of high and abnormal noise during the use of the air-conditioning axial flow fan blades; and when it rotates to do work, the high-speed airflow generated is more obvious to impact the downstream, which causes a large shedding broadband noise, and also causes peak noise such as wake vortex.

[0004] In view of the above-mentioned related technologies, it is necessary to propose an axial flow fan blade and an axial flow fan to solve one of the above-mentioned technical problems. Summary of the invention

[0005] In order to solve one of the above-mentioned technical problems, the present application provides an axial flow fan blade and an axial flow fan.

[0006] The present application provides an axial flow fan blade adopting the following technical solution:

[0007] An axial flow fan blade, comprising:

[0008] A hub and a plurality of blades connected to the outer end surface of the hub at equal intervals; the lower surface of the blade is a pressure surface, the upper surface of the blade is a suction surface, and a plurality of guide grooves are arranged at intervals on the suction surface along the airflow direction, each of the guide grooves is in a wave shape, the depth of the guide groove at the wave crest and the wave trough is greater than the depth of the guide groove at other positions, the width of the guide groove at the wave crest and the wave trough is greater than the width of the guide groove at other positions, and the groove wall of the guide groove is formed with concave arc surfaces arranged in an array;

[0009] Each of the blades further includes a connecting section connected to the hub and a tail connected to the connecting section.

[0010] By adopting the above technical scheme, a plurality of guide grooves are arranged on the upper surface of the blade, which can effectively guide the airflow to flow along a specific path, reduce turbulence, and improve the stability and efficiency of the airflow; the airflow can be guided more effectively, and the separation and vortex generation of the airflow on the surface of the blade can be reduced, so that the airflow can pass through the blade more smoothly, thereby improving the aerodynamic efficiency of the fan; the guide grooves have a larger depth and width at the crests and troughs, which can better capture and guide the airflow, increase the contact area and action time between the airflow and the blade, and thus increase the air volume of the fan; since the airflow flows more smoothly, the energy consumption required by the fan during operation is reduced, which helps to improve the energy efficiency ratio of the entire system; the special design of the crests and troughs and the concave arc surface on the groove wall can disrupt and disperse the vortex formed by the airflow on the surface of the blade, reduce the intensity and scale of the vortex, and thus reduce the noise generated by the vortex.

[0011] Optionally, the depth of the guide groove is set within 1 mm; the distance a between two adjacent crests or troughs of the guide groove is in the range of 10 mm to 25 mm, and the angle α between the crest hypotenuse of the guide groove and the central axis of the trough is in the range of 15° to 45°.

[0012] By adopting the above technical scheme, the guide groove is a wave-shaped groove that can effectively guide the airflow to flow stably along the upper surface of the blade, reduce the airflow separation phenomenon, and improve the airflow efficiency; the depth of the guide groove is set within 1mm, so that the groove can better control the airflow and reduce turbulent loss without affecting the structural strength of the blade; the depth change adjustment at different positions further optimizes the airflow path and improves the overall performance of the axial flow fan; the distance a between two adjacent crests or troughs of the guide groove is in the range of 10mm~25mm, which can effectively disperse the airflow and avoid turbulence caused by local airflow concentration, thereby improving the stability and uniformity of the airflow; at the same time, the angle α between the hypotenuse of the crest and the central axis of the trough is in the range of 15°~45°, which helps to optimize the airflow path, reduce airflow separation, further improve airflow efficiency and reduce noise.

[0013] Optionally, the front and rear arrangement density spacing b of the guide grooves is in the range of 5 mm to 30 mm.

[0014] By adopting the above technical solution, the density spacing b of the front and rear arrangement of the guide grooves is in the range of 5mm~30mm, which can effectively adapt to the speed of the airflow flowing through the blade surface, thereby optimizing the airflow distribution, improving the airflow stability and efficiency, reducing airflow turbulence, and reducing noise.

[0015] Optionally, an angle β between a tangent line of a circle at a middle intersection point of the tail portion and an edge of the tail portion close to the wheel hub is in a range of 15° to 60°.

[0016] By adopting the above technical solution, the tail design can effectively adjust the airflow wake, reduce vortex formation, reduce noise, and improve airflow stability, thereby improving the overall performance; specifically, the angle β between the tangent of the circle at the middle intersection of the tail and one of the edges of the tail is in the range of 15°~60°, which makes the airflow smoother when it separates at the tail, reduces the generation of turbulence, and further improves the working efficiency and quietness of the fan.

[0017] Optionally, the smoothness of the surface between adjacent guide grooves of the blade is greater than the smoothness of the remaining surface of the blade.

[0018] By adopting the above technical solution, the smooth surface can reduce the friction resistance of the airflow on the blade surface, allowing the airflow to pass through the blade more smoothly, thereby improving the aerodynamic efficiency of the fan; the smooth surface helps to reduce the separation of the airflow on the blade surface and the generation of vortices, allowing the airflow to flow more stably.

[0019] Optionally, the trailing edge of the blade is a serrated structure.

[0020] By adopting the above technical solution, the serrated trailing edge structure has a significant noise reduction effect. It can reduce the pressure pulsation near the trailing edge, mainly the low-frequency pressure pulsation, thereby reducing the noise caused by the pressure pulsation; the serrated trailing edge structure can change the vibration characteristics of the blade and improve the stability of the blade.

[0021] An axial flow fan, comprising:

[0022] A wind frame, wherein a bearing frame is disposed at the rear end of the wind frame, a driving assembly is disposed at the bearing frame, and a plurality of axial flow fan blades are disposed on the driving assembly;

[0023] A stabilizing component is arranged in the wind frame and corresponds to the outer periphery of the driving component, and is used to stabilize the driving component. The stabilizing component includes a plurality of connecting sleeves, stabilizing rods and springs. The plurality of connecting sleeves are respectively connected to the inner wall of the wind frame and the outer periphery of the driving component. The stabilizing rods are arranged between the connecting sleeves that are opposite to each other. The two ends of the stabilizing rods are respectively slidably connected to the inner walls of the connecting sleeves. A plurality of springs are arranged in the connecting sleeves. One end of the spring is connected to the interior of the connecting sleeve, and the other end is connected to the end of the stabilizing rod.

[0024] By adopting the above technical solution, the stabilizing component can effectively enhance the stability of the driving component in the wind frame; specifically, the connecting sleeves are respectively connected to the inner wall of the wind frame and the outer periphery of the driving frame, thereby ensuring the integrity of the structure; the sliding connection design of the stabilizing rod between the connecting sleeves enables the stabilizing component to maintain dynamic balance under different working conditions, thereby further improving the reliability of the system; the spring design can absorb vibration energy when subjected to external impact, thereby reducing the shaking of the driving component and extending the service life of the equipment.

[0025] Optionally, a cleaning component is provided through the top of the wind frame, and the cleaning component includes a lifting frame, an adsorption frame, a cleaning cotton layer and an adsorption pump. The lifting frame is provided through the top of the wind frame, and a lifting cylinder is provided in the lifting frame. The adsorption frame is provided on the output end of the lifting cylinder. A cleaning groove is provided at the bottom of the adsorption frame. The cleaning cotton layer is provided on the inner wall of the cleaning groove. Both the cleaning cotton layer and the cleaning groove are provided with adsorption holes, and the adsorption holes extend into the adsorption frame. The adsorption pump is provided on the top of the lifting frame, and a connecting hose is provided between the adsorption pump and the adsorption frame for dust adsorption and guiding.

[0026] By adopting the above technical solution, dust or dirt accumulates on the surface of blades that have been used for too long, which can easily lead to increased vibration of the blades during the operation of the blades, resulting in increased noise when the blades are running. When the blades are running slowly, the adsorption frame can be lowered through the output end of the lifting cylinder, and the cleaning cotton layer in the cleaning groove can be brought into contact with the outer surface of the blades. When the blades are running slowly, the outer surface of the blades is cleaned, and an adsorption force is generated by the adsorption pump to adsorb dust or dirt from the adsorption holes to avoid secondary adhesion to the blades, thereby improving the cleanliness of the outer surface of the blades.

[0027] Optionally, the driving assembly includes a driving frame and a driving motor, the driving frame is fixedly connected to the supporting frame, the driving frame is arranged in the wind frame, the stabilizing assembly is used to stabilize the driving frame in the wind frame, the front end face of the driving frame is provided with a mounting groove, the driving motor is arranged in the mounting groove, the output shaft of the driving motor is connected to the hub of the axial flow fan blade, and a limiting disk is provided on the positive end face of the driving frame and outside the end head of the driving motor, the limiting disk has an opening in the middle, and the output shaft of the driving motor passes through the middle opening of the limiting disk.

[0028] By adopting the above technical scheme, the structural design of the drive assembly enables the drive motor to be stably installed in the wind frame, thereby improving the operating stability of the entire axial flow fan; specifically, the fixed connection and mounting groove design of the drive frame ensure the stability of the drive motor, reduce vibration and noise, and extend the service life of the equipment; at the same time, the connection method between the output shaft of the drive motor and the hub ensures the high efficiency and reliability of power transmission, improves the working efficiency of the fan, and the limit disc can effectively limit the position of the drive motor to prevent the drive motor from shaking during operation, thereby ensuring the stability and reliability of the drive motor; at the same time, the opening design in the middle of the limit disc allows the output shaft of the drive motor to pass through smoothly, thereby ensuring a reliable connection between the drive motor and the hub, and improving the overall performance and operating stability of the axial flow fan.

[0029] Optionally, the supporting frame includes a cross supporting plate and a supporting plate, the cross supporting plate is arranged at the rear end of the wind frame, the four corners of the cross supporting plate are fixedly connected to the four corners of the rear end of the wind frame by bolts, and the supporting plate is fixedly connected to the middle part of the cross supporting plate for connecting to the driving assembly.

[0030] By adopting the above technical solution, the design of the cross-bearing plate and the bearing plate enables the bearing frame to be more stably installed at the rear end of the wind frame, thereby improving the structural stability of the entire axial flow fan; specifically, the four corners of the cross-bearing plate are fixedly connected to the four corners of the rear end of the wind frame by bolts, thereby ensuring the firmness of the bearing frame and preventing loosening due to vibration; at the same time, the bearing plate is fixedly connected to the middle part of the cross-bearing plate, thereby providing a reliable support point for the drive assembly, further enhancing the stability of the drive assembly, thereby improving the overall performance and service life of the axial flow fan.

[0031] Optionally, a support base is provided at the bottom of the wind frame, and the support base is used to support the wind frame.

[0032] By adopting the above technical solution, the overall stability and reliability of the axial flow fan are improved, and vibration and noise problems caused by unstable wind frame are prevented.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. By setting multiple guide grooves on the upper surface of the blade, the airflow can be effectively controlled to flow along the predetermined path, avoiding airflow turbulence, thereby reducing shedding noise, and significantly improving the ventilation efficiency and stability of the axial flow fan; the guide groove adopts a wave-shaped groove design, and the depth and spacing are inconsistent. Different sizes can be set at different positions, which can better adapt to airflows of different speeds, further improving the accuracy of airflow control and the operating efficiency of the fan;

[0035] 2. The broken-line tail is set at the trailing edge of the blade, which can effectively adjust the airflow wake, reduce the mutual influence of the high-speed airflow wake it generates, and reduce the impact on the downstream, thereby reducing the shedding broadband noise and the peak noise of the impact airflow, and improving the quietness of the fan operation;

[0036] 3. The design of the stabilizing component, including the connecting sleeve, stabilizing rod and spring, can effectively absorb and buffer the vibration of the driving component during operation, reduce the generation of noise, and improve the running stability and service life of the fan; and improve the cleanliness of the outer surface of the blade through the cleaning component, reducing the impact of dust or dirt on the operation of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a first perspective view of an axial flow fan blade in the present application.

[0038] Figure 2 This is a second viewing angle view of an axial flow fan blade in the present application.

[0039] Figure 3 This is a view (with dimension markings) of an axial flow fan blade in this application.

[0040] Figure 4 It is a three-dimensional view of an axial flow fan in this application.

[0041] Figure 5 It is a front view of an axial flow fan in the present application (the stabilizing component is in a cross-sectional state and does not have axial flow blades).

[0042] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure at center Α.

[0043] Figure 7 It is a front view of an axial flow fan (with axial flow blades) in the present application.

[0044] Figure 8 yes Figure 7 A cross-sectional view of the cleanup assembly.

[0045] Fig. 9 It is a curve chart comparing the noise of an axial flow fan blade in the air conditioner outdoor unit test in the present application with the prior art (the blades in the prior art are not provided with guide grooves).

[0046] In the figure: 1. hub; 2. blades; 21. pressure surface; 22. suction surface; 23. guide groove; 24. tail; 3. wind frame; 31. bearing frame; 311. cross bearing plate; 312. bearing plate; 32. drive assembly; 321. drive frame; 322. drive motor; 323. limit disc; 33. support seat; 4. stabilizing assembly; 41. connecting sleeve; 42. stabilizing rod; 43. spring; 5. cleaning assembly; 51. lifting frame; 52. adsorption frame; 53. cleaning cotton layer; 54. adsorption pump; 55. lifting cylinder; 56. cleaning groove; 57. adsorption hole; 58. connecting hose. DETAILED DESCRIPTION

[0047] The following is combined with the accompanying drawings Figure 1-Figure 9 This application is described in further detail.

[0048] Example 1, reference Figure 1-Figure 3 The embodiment of the present application discloses an axial flow fan blade, comprising: a hub 1 and a plurality of blades 2 connected to the outer end surface of the hub 1 at equal intervals.

[0049] The lower surface of the blade 2 is a pressure surface 21, and the upper surface of the blade 2 is a suction surface 22. A plurality of guide grooves 23 are arranged at intervals along the airflow direction on the suction surface 22. Each guide groove 23 is in a wave shape. The depth of the guide groove 23 at the wave crest and the wave trough is greater than the depth of the guide groove 23 at other positions. The width of the guide groove 23 at the wave crest and the wave trough is greater than the width of the guide groove 23 at other positions. The groove wall of the guide groove 23 is formed with an array of concave arc surfaces, which can more effectively guide the airflow, reduce the separation of the airflow on the surface of the blade 2 and the generation of vortices, and make the airflow smoother. The air flows smoothly through the blades 2, thereby improving the aerodynamic efficiency of the fan; the depth and width of the guide groove 23 at the crest and trough are large, which can better capture and guide the airflow, increase the contact area and action time between the airflow and the blades 2, and thus increase the air volume of the fan; since the airflow flows more smoothly, the energy consumption required by the fan during operation is reduced, which helps to improve the energy efficiency ratio of the entire system; the special design of the crest and trough and the concave arc surface on the groove wall can disrupt and disperse the vortex formed by the airflow on the surface of the blade 2, reduce the intensity and scale of the vortex, and thus reduce the noise generated by the vortex;

[0050] Each blade 2 also includes a connecting section connected to the hub 1 and a tail 24 connected to the connecting section. The tail 24 has a broken line shape, in which one straight line is drawn from the periphery of the hub 1 to the middle of the tail 24 of the blade 2, and another straight line is drawn from the outermost edge of the blade 2 to the middle of the tail 24.

[0051] A plurality of guide grooves 23 are arranged on the upper surface of the blade 2, which can effectively guide the airflow to flow along a specific path, reduce turbulence, and improve the stability and efficiency of the airflow; at the same time, the zigzag tail 24 is designed to resemble the shape of a swallow's tail, which not only helps to reduce air resistance, but also controls the stability of the wake, further optimizes the airflow wake, reduces noise and improves overall performance.

[0052] In this embodiment, more specifically, the guide groove 23 is used to control the airflow to flow on the upper surface of the blade 2. The depth of the guide groove 23 is set within 1 mm, and the depth of the guide groove 23 is adjusted at different positions. The guide groove 23 is a wave-shaped groove that can effectively guide the airflow to flow stably along the upper surface of the blade 2, reduce the airflow separation phenomenon, and improve the airflow efficiency; the depth of the guide groove 23 is set within 1 mm, so that the groove can better control the airflow and reduce turbulent losses without affecting the structural strength of the blade 2; the depth change adjustment at different positions further optimizes the airflow path and improves the overall performance of the axial flow fan.

[0053] refer to Figure 3 In the present embodiment, more specifically, the distance a between two adjacent wave crests or wave troughs of the guide groove 23 is in the range of 10 mm to 25 mm, which can effectively disperse the airflow and avoid turbulence caused by local airflow concentration, thereby improving the stability and uniformity of the airflow; at the same time, the angle α between the wave crest bevel of the guide groove 23 and the central axis of the wave trough is in the range of 15° to 45°, and the angles α between the wave crest bevel and the central axis of the wave trough of different guide grooves 23 can be set to be inconsistent, forming multiple groups of different angles α between the wave crest bevel and the central axis of the wave trough of the guide groove 23, which helps to optimize the airflow path, reduce airflow separation, and further improve airflow efficiency and reduce noise.

[0054] refer to Figure 3 In the present embodiment, more specifically, the front and rear arrangement density spacing b of the guide grooves 23 is in the range of 5 mm to 30 mm, and the front and rear arrangement density spacing b of the guide grooves 23 can be set to be inconsistent, forming a plurality of different front and rear arrangement density spacings b of the guide grooves 23, which are used to adapt to the speed of the airflow flowing through the surface of the blade 2, and can effectively adapt to the speed of the airflow flowing through the surface of the blade 2, thereby optimizing the airflow distribution, improving the airflow stability and efficiency, reducing the airflow turbulence, and reducing the noise.

[0055] refer to Figure 3 In the present embodiment, more specifically, the angle β between the tangent line of the circumference of the middle intersection point of the tail 24 and an edge of the tail 24 close to the hub 1 is in the range of 15° to 60°, which is used to adjust the airflow wake of the tail 24. The design of the tail 24 can effectively adjust the airflow wake, reduce vortex formation, reduce noise, and improve airflow stability, thereby improving the overall performance; making the airflow smoother when separating at the tail 24, reducing the generation of turbulence, and further improving the working efficiency and quietness of the fan.

[0056] The implementation principle of an axial flow fan blade in an embodiment of the present application is as follows: a plurality of guide grooves 23 are arranged on the upper surface of the blade 2, which can effectively guide the airflow to flow along a specific path, reduce turbulence, and improve the stability and efficiency of the airflow; at the same time, the zigzag tail 24 design can further optimize the airflow wake, reduce noise and improve overall performance.

[0057] Embodiment 2: The difference between this embodiment and embodiment 1 is that the guide groove 23 is serrated, and the depth and width of the crests and troughs of the serrated guide groove 23 are larger, which can better capture and guide the airflow, increase the contact area and action time between the airflow and the blades 2, and thus increase the air volume of the fan.

[0058] In this embodiment, more specifically, the smoothness of the surface between adjacent guide grooves 23 of blade 2 is greater than the smoothness of the other surfaces of blade 2. The smooth surface can reduce the friction resistance of the airflow on the surface of blade 2, allowing the airflow to pass through blade 2 more smoothly, thereby improving the aerodynamic efficiency of the fan; the smooth surface helps to reduce the separation of the airflow on the surface of blade 2 and the generation of vortices, allowing the airflow to flow more stably.

[0059] In this embodiment, more specifically, the trailing edge of the blade 2 is a serrated structure, and the serrated trailing edge structure has a significant noise reduction effect; it can reduce the pressure pulsation near the trailing edge, and mainly the low-frequency pressure pulsation, thereby reducing the noise caused by the pressure pulsation; the serrated trailing edge structure can change the vibration characteristics of the blade 2 and improve the stability of the blade 2.

[0060] Example 3, reference Figure 4-Figure 6 , an axial flow fan, comprising: a wind frame 3 and a stabilizing component 4, a bearing frame 31 is provided at the rear end of the wind frame 3, a driving component 32 is provided at the bearing frame 31, and a plurality of axial flow fan blades are provided on the driving component 32; the stabilizing component 4 is arranged in the wind frame 3, and is arranged around the outside of the corresponding driving component 32, for stabilizing the driving component 32, the stabilizing component 4 comprises a plurality of connecting sleeves 41, stabilizing rods 42 and springs 43, the plurality of connecting sleeves 41 are respectively connected to the inner wall of the wind frame 3 and the outside of the driving component 32, the stabilizing rods 42 are arranged between the connecting sleeves 41 opposite to each other, the two ends of the stabilizing rods 42 are respectively slidably connected to the inner wall of the connecting sleeve 41, and the plurality of springs 43 are arranged in the connecting sleeve 41, one end of the spring 43 is connected to the inside of the connecting sleeve 41, and the other end is connected to the end of the stabilizing rod 42.

[0061] The stabilizing component 4 can effectively enhance the stability of the driving component 32 in the wind frame 3; specifically, the connecting sleeve 41 is respectively connected to the inner wall of the wind frame 3 and the outer periphery of the driving frame 321, thereby ensuring the integrity of the structure; the sliding connection design of the stabilizing rod 42 between the connecting sleeve 41 enables the stabilizing component 4 to maintain dynamic balance under different working conditions, thereby further improving the reliability of the system; the design of the spring 43 can absorb vibration energy when subjected to external impact, thereby reducing the shaking of the driving component 32 and extending the service life of the equipment.

[0062] In the present embodiment, more specifically, the driving assembly 32 includes a driving frame 321 and a driving motor 322. The driving frame 321 is fixedly connected to the bearing frame 31, and the driving frame 321 is arranged in the wind frame 3. The stabilizing assembly 4 is used to stabilize the driving frame 321 in the wind frame 3. The front end surface of the driving frame 321 is provided with a mounting groove, and the driving motor 322 is arranged in the mounting groove. The output shaft of the driving motor 322 is connected to the hub 1 of the axial flow fan blade. A limiting disk 323 is provided on the positive end surface of the driving frame 321 and relative to the end of the driving motor 322. The limiting disk 323 has an opening in the middle, and the output shaft of the driving motor 322 passes through the middle opening of the limiting disk 323. The structural design of the driving assembly 32 enables the driving motor 322 to be stably installed in the wind frame 3, thereby improving the stability of the entire shaft. The operation stability of the axial flow fan; specifically, the fixed connection and the mounting groove design of the driving frame 321 ensure the stability of the driving motor 322, reduce vibration and noise, and extend the service life of the equipment; at the same time, the connection method between the output shaft of the driving motor 322 and the hub 1 ensures the high efficiency and reliability of power transmission, improves the working efficiency of the fan, and the limiting disc 323 can effectively limit the position of the driving motor 322 to prevent the driving motor 322 from shaking during operation, thereby ensuring the stability and reliability of the driving motor 322; at the same time, the opening design in the middle of the limiting disc 323 allows the output shaft of the driving motor 322 to pass smoothly, thereby ensuring the reliable connection between the driving motor 322 and the hub 1, and improving the overall performance and operation stability of the axial flow fan.

[0063] In the present embodiment, more specifically, the bearing frame 31 includes a cross bearing plate 311 and a bearing plate 312, the cross bearing plate 311 is arranged at the rear end of the wind frame 3, the four corners of the cross bearing plate 311 are fixedly connected to the four corners of the rear end of the wind frame 3 by bolts, the bearing plate 312 is fixedly connected to the middle of the cross bearing plate 311, and is used to connect with the drive assembly 32, the design of the cross bearing plate 311 and the bearing plate 312 enables the bearing frame 31 to be more stably installed at the rear end of the wind frame 3, thereby improving the structural stability of the entire axial flow fan; specifically, the four corners of the cross bearing plate 311 are fixedly connected to the four corners of the rear end of the wind frame 3 by bolts, thereby ensuring the firmness of the bearing frame 31 and preventing loosening due to vibration; at the same time, the bearing plate 312 is fixedly connected to the middle of the cross bearing plate 311, thereby providing a reliable support point for the drive assembly 32, further enhancing the stability of the drive assembly 32, thereby improving the overall performance and service life of the axial flow fan.

[0064] In this embodiment, more specifically, a support base 33 is provided at the bottom of the wind frame 3, and the support base 33 is used to support the wind frame 3, improve the overall stability and reliability of the axial flow fan, and prevent vibration and noise problems caused by the instability of the wind frame 3.

[0065] The implementation principle of an axial flow fan in an embodiment of the present application is as follows: a carrier frame 31 is provided at the rear end of the wind frame 3, a driving assembly 32 is provided at the carrier frame 31, the axial flow fan blades are driven to operate by the driving assembly 32, and the stability of the driving assembly 32 in the wind frame 3 can be effectively enhanced by the stabilizing assembly 4, so that the entire structure is more stable and the vibration during operation is reduced.

[0066] Example 4, reference Figure 7-Figure 8The difference between this embodiment and the third embodiment is that: a cleaning component 5 is provided through the top of the wind frame 3, and the cleaning component 5 includes a lifting frame 51, an adsorption frame 52, a cleaning cotton layer 53 and an adsorption pump 54. The lifting frame 51 is provided through the top of the wind frame 3, and a lifting cylinder 55 is provided in the lifting frame 51. The adsorption frame 52 is provided on the output end of the lifting cylinder 55. A cleaning groove 56 is provided at the bottom of the adsorption frame 52. The cleaning cotton layer 53 is provided on the inner wall of the cleaning groove 56. The cleaning cotton layer 53 and the cleaning groove 56 are both provided with adsorption holes 57, and the adsorption holes 57 extend into the adsorption frame 52. The adsorption pump 54 is provided at the top of the lifting frame 51, and a connection is provided between the adsorption pump 54 and the adsorption frame 52. The hose 58 is used for dust adsorption and guidance. The adsorption frame 52 and the cleaning cotton layer 53 are adapted to the shape of the blade 2 for better cleaning. Dust or dirt is accumulated on the surface of the blade 2 that has been used for too long. During the operation of the blade 2, it is easy to cause the vibration of the blade 2 to increase, so that the noise generated by the blade 2 during operation increases. When the blade 2 runs slowly, the adsorption frame 52 can be lowered through the output end of the lifting cylinder 55, and the cleaning cotton layer 53 in the cleaning groove 56 contacts the outer surface of the blade 2. When the blade 2 runs slowly, the outer surface of the blade 2 is cleaned, and the adsorption pump 54 generates an adsorption force to adsorb dust or dirt from the adsorption hole 57 to avoid secondary adhesion to the blade 2, thereby improving the cleanliness of the outer surface of the blade 2.

[0067] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An axial flow fan blade, characterized in that: include: A hub (1) and a plurality of blades (2) connected to the outer end surface of the hub (1) at equal intervals; the lower surface of the blade (2) is a pressure surface (21), the upper surface of the blade (2) is a suction surface (22), a plurality of guide grooves (23) are arranged at intervals along the flow direction of the airflow on the suction surface (22), each of the guide grooves (23) is in a wave shape, the depth of the guide groove (23) at the wave crest and the wave trough is greater than the depth of the guide groove (23) at other positions, the width of the guide groove (23) at the wave crest and the wave trough is greater than the width of the guide groove (23) at other positions, and the groove wall of the guide groove (23) is formed with concave arc surfaces arranged in an array; Each blade (2) further comprises a connecting section connected to the hub (1) and a tail portion (24) connected to the connecting section.

2. The axial flow fan blade according to claim 1, characterized in that: The depth of the guide groove (23) is set within 1 mm; the distance a between two adjacent wave crests or wave troughs of the guide groove (23) is in the range of 10 mm to 25 mm, and the angle α between the crest hypotenuse of the guide groove (23) and the central axis of the wave trough is in the range of 15° to 45°.

3. An axial flow fan blade according to claim 2, characterized in that: The guide grooves (23) are arranged in a front-to-back density spacing b in a range of 5 mm to 30 mm.

4. The axial flow fan blade according to claim 1, characterized in that: An included angle β between a tangent line of a circumference of a middle intersection point of the tail portion (24) and an edge of the tail portion (24) close to the wheel hub (1) is in the range of 15° to 60°.

5. The axial flow fan blade according to claim 1, characterized in that: The smoothness of the surface of the blade (2) between adjacent guide grooves (23) is greater than the smoothness of the remaining surface of the blade (2).

6. An axial flow fan, characterized in that: include: A wind frame (3), wherein a bearing frame (31) is provided at the rear end of the wind frame (3), a driving assembly (32) is provided at the bearing frame (31), and a plurality of axial flow fan blades according to any one of claims 1 to 4 are provided on the driving assembly (32), the bearing frame (31) comprises a cross bearing plate (311) and a bearing disk (312), the cross bearing plate (311) is provided at the rear end of the wind frame (3), the four corners of the cross bearing plate (311) are fixedly connected to the four corners of the rear end of the wind frame (3) by bolts, and the bearing disk (312) is fixedly connected to the middle part of the cross bearing plate (311) for connecting to the driving assembly (32); A stabilizing component (4) is arranged in the wind frame (3) and corresponds to the outer periphery of the driving component (32) for stabilizing the driving component (32). The stabilizing component (4) comprises a plurality of connecting sleeves (41), stabilizing rods (42) and springs (43). The plurality of connecting sleeves (41) are respectively connected to the inner wall of the wind frame (3) and the outer periphery of the driving component (32). The stabilizing rods (42) are arranged between the connecting sleeves (41) that are opposite to each other. The two ends of the stabilizing rods (42) are respectively slidably connected to the inner wall of the connecting sleeve (41). The plurality of springs (43) are arranged in the connecting sleeve (41). One end of the spring (43) is connected to the inside of the connecting sleeve (41), and the other end is connected to the end of the stabilizing rod (42).

7. An axial flow fan according to claim 6, characterized in that: A cleaning assembly (5) is provided through the top of the wind frame (3), and the cleaning assembly (5) comprises a lifting frame (51), an adsorption frame (52), a cleaning cotton layer (53) and an adsorption pump (54). The lifting frame (51) is provided through the top of the wind frame (3), a lifting cylinder (55) is provided inside the lifting frame (51), the adsorption frame (52) is arranged on the output end of the lifting cylinder (55), a cleaning groove (56) is provided at the bottom of the adsorption frame (52), the cleaning cotton layer (53) is arranged on the inner wall of the cleaning groove (56), the cleaning cotton layer (53) and the cleaning groove (56) are both provided with adsorption holes (57), and the adsorption holes (57) extend into the adsorption frame (52), the adsorption pump (54) is provided at the top of the lifting frame (51), and a connecting hose (58) is provided between the adsorption pump (54) and the adsorption frame (52) for dust adsorption and guidance.

8. An axial flow fan according to claim 6, characterized in that: The driving assembly (32) comprises a driving frame (321) and a driving motor (322); the driving frame (321) is fixedly connected to the bearing frame (31); the driving frame (321) is arranged in the wind frame (3); the stabilizing assembly (4) is used to stabilize the driving frame (321) in the wind frame (3); a front end surface of the driving frame (321) is provided with a placement groove; the driving motor (322) is arranged in the placement groove; the output shaft of the driving motor (322) is connected to the hub (1) of the axial flow fan blade; a limiting disc (323) is arranged on the front end surface of the driving frame (321) and on the outside of the end of the driving motor (322); the limiting disc (323) has an opening in the middle; the output shaft of the driving motor (322) passes through the opening in the middle of the limiting disc (323).

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